Former Liberal MP Bernie Masters says he will run against Troy Buswell in March elections because past indiscretions make him unfit to sit in parliament.
Mr Masters said today that he would run hard against the former Liberal Party leader, who got into trouble with well-publicised chair-sniffing, bra-snapping antics.
Mr Masters said these were "very much" the reasons he would contest the south-west seat of Vasse.
While the member for Vasse in 2003, Mr Masters lost Liberal Party endorsement to contest the 2005 election.
Mr Buswell was instead selected and went on to win the 2005 and 2008 elections.
"Early on in his political life, he was touted as the 'great hope' of the Liberal Party, being seen by some as a future leader and premier," Mr Masters says in his blog.
"Since then, we have witnessed his many indiscretions and personality failings."
Mr Buswell was last month reappointed treasurer after the surprise resignation of Christian Porter, who is seeking to enter federal politics.
Mr Buswell was forced to resign as treasurer in 2010 amid allegations he misused entitlements during an affair with one-time Greens MP Adele Carles, but was later cleared of any wrongdoing.
He recently said he had no desire to lead the Liberal Party and could not imagine any circumstance in which he would become premier.
Mr Buswell was being sought for comment.
Separately, an ABC report suggests Mr Porter is not a shoe-in for the federal seat of Pearce.
Alexander Butterworth, Bill Crabtree and Rob Henderson are also vying for preselection for the seat on Sunday.It was understood Mr Butterworth, 24, had been pushing hard to win support for the past two years and had not backed down since Mr Porter announced he would nominate for the seat, the ABC reported.
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